The tool was meant to generate various kinds of texts in Sonic 2; however, due to the September 2007 Disassembly(info) (2.5 MB) by Xenowhirl, most kinds of text can be simply edited as ASCII. The only kinds of text that weren't having this function are Zone Title Cards and End of Level Title Cards. That's why it only contains those features (even though there's also a small extra tool that tells you every starting position of those ASCII editable texts).